Natt Proudfoot

Skulk, double strike
Whenever Natt Proudfoot deals combat damage
to a player you may discard a card, if you do
return another target card from your graveyard
to your hand.
{3}{w}{g}: Natt Proudfoot gets +X/+0 until end of
turn, where X is equal to the number of card
types among cards in your graveyard.